package com.um.swing.common.util;

/**
 * 名称：版本号工具类
 * 创建人：袁泉
 * 创建时间：2022年05月08日18:51:10
 */
public class VersionUtil {
    /**
     * 版本号比较
     *
     * @param v1
     * @param v2
     * @return 0代表相等，1代表左边大，2代表右边大
     * Utils.compareVersion("1.0.358_20180820090554","1.0.358_20180820090553")=1
     */
    public static int compareVersion(String v1, String v2) {
        if (v1.equals(v2)) {
            return 0;
        }
        String[] version1Array = v1.split("[._]");
        String[] version2Array = v2.split("[._]");
        int index = 0;
        int minLen = Math.min(version1Array.length, version2Array.length);
        long diff = 0;

        while (index < minLen
                && (diff = Long.parseLong(version1Array[index])
                - Long.parseLong(version2Array[index])) == 0) {
            index++;
        }
        if (diff == 0) {
            for (int i = index; i < version1Array.length; i++) {
                if (Long.parseLong(version1Array[i]) > 0) {
                    return 1;
                }
            }

            for (int i = index; i < version2Array.length; i++) {
                if (Long.parseLong(version2Array[i]) > 0) {
                    return 2;
                }
            }
            return 0;
        } else {
            return diff > 0 ? 1 : 2;
        }
    }

    public static void main(String[] args) {
        compareVersion("1.0.1","1.0.0");
    }
}
